Program OM Link is used for easy setting up and control of Orbit Merret measuring instruments as well as for firmware upgrade and visualisation of measured values. OM link interface is a standard with practically all currently made microcontroller based devices. This interface is not galvanic isolated and is designed to withstand electromagnetic interference, hence is not suitable for industrial use. If a permanent connection to a PC is required, optional data output can be used (galvanic isolated and interference resilient). When using the OM Link standard interface a special convertor to USB is needed. If optional data output is used, a direct connection is possible to PC if RS 232 is present on both ends, or RS 485/232 to USB convertor is needed. We manufacture such convertor. (version USB or RS232).